Robced-dbatt device



- J. L. AXEN.

FORCED DRAFT DEVICE.

APPLICATION FILED DEC. I8. 1918.

lutcntudSopt. 2, 1919.

JOHN 1;. MEN, OF DETROIT, MICHIGAN.

FOBGEIl-DBAFT DEVICE.

Specification of Letters Patent.

Patented Sept. 2, 1919.

Application filed December 18, 1918. Serial No. 267,284.

To all whom it may concern:

Be it known that I, JOHN L. AxnN, a on;- izen of the United States, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Forced-Draft Devices, of which the following is a specification.

My invention relates to means for accelerating or producinfirmovement of air or other fluid, or liquid, t ough a condu1t or pipe.

In many environments, it is desirable to accelerate the draft of air, at t1mes, as in smoke pipes, or breeching of a furnace or boiler, to intensify combust1on, or to as s1st in the distribution of heated a1r, as in hot air furnaces or the like, or for accelerating the movement of other fluids or liquids through pipes or condu1ts.

In carrying my invention into effect I place a damper, or valve in a conduit and construct a bypass around the damper, or valve, and place another damper, or valve in the bypass, and employ, preferably, a single instrumentalit to operate the two valves, so arranged t at when one valve is open the other is closed.

In the b pass, on either side of the bypass valve or amper, I' insert a power driven propeller, such for example, as a fan or liquid propeller, to accelerate or mltlate the movement of the contents of the condult.

In a preferred embodiment of my invention, shown by the accompanymg drawin s igure 1 is a side elevation, partly in section, of a conduit and bypass.

Fig. 2 is an end view of the same.

In both views the same reference characters are employed to indicate similar parts.

5 is a straight conduit with a dam er 6, dividing it into sections 7 and 8, when 0 osed.

A bypass 9 is connected to the section 8, as at 10, and to the section 7, as at 11. In the bypass I have placed another damper or valve 12, set at right angles to the dam er 6. A rod or stem 13 passes through the ypass and through the conduit 5, and operates the angularly disposed dampers 6 and 12 by means of a handle 14. The arrange: ment is such that when the sections 7 an 8 of the conduit 5 are separated, by the damper 6, the sections 15 and 16 of the bypass are open. When the damper rod 13 is rotated so as to place the dampers, or valves, in

their alternative positions, then the conduit w1ll be open and the b ass closed.

In the branch 16 of t e b pass 9, I have placed a propeller, or fan 1 driven by an electric motor 18, that ma be supported by a suitable frame 19. T e fan, or propeller 17, may be adated for moving liquids, gases or other fluids through the conduit. When the motor is energized the propeller 17 will 'be rotated, and with the valve 6 closed, air or other fluid will be driven through the bypass by the effect of the rotating propeller. When the dampers, or valves, are arranged so that there is an unobstructed passagewa through the conduit 5, the damper 12 in t e bypass will be closed and the bypass will have no effect whatever upon the fluids or liquids that are passin through the conduit, and when it is desire to accelerate the movement of the fluid, or liquid through the conduit, then the damper 6 is closed and the damper 12 opened, and the propeller 17 set in motion.

It will, of course, be manifest that the propeller may, instead as shown, he laced 1n the branc 15, of the bypass an that without material modification the fluid ma be made to pass forcibly from the section to the section 8 of the conduit, or from section 8 to section 7, as desired.

In the claims I have used the term valve to include dampers or other forms of valves that are substantial equivalents.

While I have herein shown a single embodiment of my invention, for the purpose of clear disclosure, it will be manifest to persons skilled in the art, that changes may e made in the general arran ement and disposition of the parts within t e scope of the ap ended claims.

aving described my invention, what I claim is 1. In combination with a conduit avalve in the conduit dividing the conduit 1nto two rotated; to open one valve and close theother; an air propeller in one said vertical. leg, a. motor having iteshaft extending into Silld leg to operate said air propeller and 'scribe my name.

a mounting connected to said conduit and said vertical leg upon which to support the motor. 10

In testimony whereof .I hereunto sub JOHN L. AXEiT, 

